diff --git a/.vsts.ix-shared.yml b/.vsts.ix-shared.yml
index 93c4797305..d6c18f4bca 100644
--- a/.vsts.ix-shared.yml
+++ b/.vsts.ix-shared.yml
@@ -16,7 +16,7 @@ steps:
   
 - task: DotNetCoreInstaller@0
   inputs:
-    version: '2.1.400-preview-009171'
+    version: '2.1.400'
 
 - task: DotNetCoreCLI@2
   inputs:
diff --git a/.vsts.rx-shared.yml b/.vsts.rx-shared.yml
index 495a0738e5..37f2f7b8e6 100644
--- a/.vsts.rx-shared.yml
+++ b/.vsts.rx-shared.yml
@@ -16,7 +16,7 @@ steps:
   
 - task: DotNetCoreInstaller@0
   inputs:
-    version: '2.1.400-preview-009171'
+    version: '2.1.400'
 
 - task: MSBuild@1
   displayName: Build System.Reactive.sln